/**
 *  @(#)  IFAAAuthenticator  module    1.0  2017/03/24
 *
 *  Copyright  (c)  2017,  IFAA  and/or  its  affiliates.  All  rights  reserved.
 *
 *  Redistribution  and  use  in  source  and  binary  forms,  with  or  without
 *  modification,  are  permitted  provided  that  the  following  conditions  are  met:
 *
 *  -Redistribution  of  source  code  must  retain  the  above  copyright  notice,  this
 *    list  of  conditions  and  the  following  disclaimer.
 *
 *  -Redistribution  in  binary  form  must  reproduce  the  above  copyright  notice,
 *    this  list  of  conditions  and  the  following  disclaimer  in  the  documentation
 *    and/or  other  materials  provided  with  the  distribution.
 *
 *  Neither  the  name  of  IFAA  or  the  names  of  contributors  may
 *  be  used  to  endorse  or  promote  products  derived  from  this  software  without
 *  specific  prior  written  permission.
 *
 *  This  software  is  provided  "AS  IS,"  without  a  warranty  of  any  kind.  ALL
 *  EXPRESS  OR  IMPLIED  CONDITIONS,  REPRESENTATIONS  AND  WARRANTIES,  INCLUDING
 *  ANY  IMPLIED  WARRANTY  OF  MERCHANTABILITY,  FITNESS  FOR  A  PARTICULAR  PURPOSE
 *  OR  NON-INFRINGEMENT,  ARE  HEREBY  EXCLUDED.  IFAA,  ORG.
 *  AND  ITS  LICENSORS  SHALL  NOT  BE  LIABLE  FOR  ANY  DAMAGES  SUFFERED  BY  LICENSEE
 *  AS  A  RESULT  OF  USING,  MODIFYING  OR  DISTRIBUTING  THIS  SOFTWARE  OR  ITS
 *  DERIVATIVES.  IN  NO  EVENT  WILL  IFAA  OR  ITS  LICENSORS  BE  LIABLE  FOR  ANY  LOST
 *  REVENUE,  PROFIT  OR  DATA,  OR  FOR  DIRECT,  INDIRECT,  SPECIAL,  CONSEQUENTIAL,
 *  INCIDENTAL  OR  PUNITIVE  DAMAGES,  HOWEVER  CAUSED  AND  REGARDLESS  OF  THE  THEORY
 *  OF  LIABILITY,  ARISING  OUT  OF  THE  USE  OF  OR  INABILITY  TO  USE  THIS  SOFTWARE,
 *  EVEN  IF  IFAA  HAS  BEEN  ADVISED  OF  THE  POSSIBILITY  OF  SUCH  DAMAGES.
 *
 *  You  acknowledge  that  this  software  is  not  designed,  licensed  or  intended
 *  for  use  in  the  design,  construction,  operation  or  maintenance  of  any
 *  nuclear  facility.
 *
 */
package com.ifaa.sdk.authenticatorservice.fingerprint.manager;

import org.ifaa.android.manager.fingerprint.IFAAFingerprintManager;
import org.ifaa.android.manager.fingerprint.IFAAFingerprintManager.IFAAAuthenticationResult;

import android.content.Context;
import android.os.CancellationSignal;

import com.ifaa.sdk.auth.AuthenticatorLOG;

/**
 * 
 * @author qiyi.wxc
 * @version $Id: IFAAFingerprintManagerCompat.java, v 0.1
 */
class IFAAClientFingerprintManager implements IFAAFingerprintManagerFacade {

    private IFAAClientFingerprintManager(Context context) {
        mContext = context;
        try {
            mFingerprintManager = IFAAFingerprintManagerFactory.getIFAAFingerprintManager(mContext);
        } catch (Exception e) {
            // do nothing
        }
    }

    private static IFAAClientFingerprintManager sInstance;

    synchronized static IFAAClientFingerprintManager getInstance(Context context) {
        if (sInstance == null) {
            sInstance = new IFAAClientFingerprintManager(context);
        }
        if (sInstance.mFingerprintManager == null) {
            return null;
        }
        return sInstance;
    }

    private IFAAFingerprintManager mFingerprintManager;

    private Context mContext;

    private CancellationSignal mCancellationSignal;

    private IFAAFingerprintManager.IFAAAuthenticationCallback mCallback;

    @Override
    public void authenticate(final IFAAFingerprintCallback callback) {
        if (mFingerprintManager == null) {
            if (callback != null) {
                callback.onAuthenticationError(-1, "fingerprintManager is null");
            }
        }

        mCancellationSignal = new CancellationSignal();

        mCallback = new IFAAFingerprintManager.IFAAAuthenticationCallback() {
            @Override
            public void onAuthenticationError(int errorCode, CharSequence errString) {
                if (callback != null) {
                    callback.onAuthenticationError(errorCode, errString);
                }
            }

            @Override
            public void onAuthenticationHelp(int helpCode, CharSequence helpString) {
                // do nothing, ignore
            }

            @Override
            public void onAuthenticationSucceeded(IFAAAuthenticationResult result) {
                if (callback != null) {
                    callback.onAuthenticationSucceeded();
                }
            }

            @Override
            public void onAuthenticationFailed() {
                if (callback != null) {
                    callback.onAuthenticationFailed();
                }
            }
        };
        try {
            mFingerprintManager.authenticate(null, mCancellationSignal, 0, mCallback, null);
        } catch (Exception e) {
            AuthenticatorLOG.error(e);
            if (callback != null) {
                callback.onAuthenticationError(-1, "exception when authing");
            }
        }
    }

    @Override
    public void cancel() {
        try {
            if (mCancellationSignal != null && !mCancellationSignal.isCanceled()) {
                mCancellationSignal.cancel();
            }
        } catch (Exception e) {
            AuthenticatorLOG.error(e);
        }
    }

    @Override
    public boolean isHardwareDetected() {
        try {
            if (mFingerprintManager == null) {
                return false;
            }
            return mFingerprintManager.isHardwareDetected();
        } catch (Exception e) {
            AuthenticatorLOG.error(e);
            return false;
        }
    }

    @Override
    public boolean hasEnrolledFingerprints() {
        try {
            if (mFingerprintManager == null) {
                return false;
            }
            return mFingerprintManager.hasEnrolledFingerprints();
        } catch (Throwable e) {
            AuthenticatorLOG.error(e);
            return false;
        }
    }

}
